TWiki Variables Quickstart 
TWiki Variables are names that are enclosed in percent signs 
% that are expanded on the fly. Some variables take arguments, such as 
%INCLUDE%. For those variables, the arguments are included in curly braces ({ and }).
| Variable | In brief | Full documentation   | 
|---|
| %ATTACHURL% | The attachment URL of the current topic. Example usage: If you attach a file to a topic you can refer to it as %ATTACHURL%/image.gifto show the URL of the file or the image in your text. | VarATTACHURL | 
| %INCLUDE{"SomeTopic"}% | Server side include, includes another topic. The current web is the default web. Example: %INCLUDE{"TWiki.SiteMap"}% | VarINCLUDE | 
| %SEARCH{"sushi"}% | Inline search showing the search result embedded in a topic. FormattedSearch gives you control over formatting, useful for creating web-based applications. | VarSEARCH | 
| %TOC% | Automatically generates a table of contents based on headings in a topic - see the top of this page for an example. | VarTOC | 
| %TOPIC% | The current topic name, is TWikiVariablesQuickStart. | VarTOPIC | 
| %WEB% | The current web, is TWiki. | VarWEB | 
TWikiPreferences defines some site-wide variables. Among them are: 
-  Line break: Write %BR%to start a new line.
-  Colored text: Write: %RED% Red %ENDCOLOR% and %BLUE% blue %ENDCOLOR% colorsto get:  Red  and  blue  colors.
There are many more variables. To see them all, go to 
TWikiVariables.
Documentation Graphics: There are many graphics available to use in your topics. Use 
%ICON{"help"}%, 
%ICON{"tip"|%, and 
%icon{"warning"}% to get: 

, 

, and 

. To see all of the graphics available, see 
TWikiDocGraphics.

 To "escape" a variable, prefix it with an exclamation mark. Write: 
!%SOMEVARIABLE% to get: %SOMEVARIABLE%.